Elevator.



No. 694,964. Patented Mar. ll, I802.

F. mazes;

ELEVATOR. (Application filed May 18, 1901-) (No Model.) 2 Sheets-Sheet L A fi e 1.

Q a ga ATTORNEY TNE NORRIS PETERS co. Pnu'rou'mow wnsnmcrou, n. c.

No. 694,964. Patented Man, I902.

F. "HElZER.

ELEVATOR.

(Application mm May 19, 1901.) I (No Model.) 2 Sheets-Sheet 2.

nvvmrom ATTORNEY U ITE STATES PATENT OFFICE.

FREDERICK HEIZER, OF SIOUX CITY, IOWA, ASSIGNOR, BY MESNE ASSIGNMENTS, 1:0 JESSIE H. 'HEIZER, OF, SIOUX CITY, IOWA.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 694,964, dated March 11, 1902.

Application filed May 18, 1901. Serial No. 60,861. (1% model.)

To aZZ whom it may concern:

Be it known that I, FREDERICK HEIZER, a citizen of the United States, residing at Sioux City, in the county of Woodbury and State of Iowa, (whose post-office address is Sioux City, Iowa,) have invented a new and useful Improvement in Elevators; and I do declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings,forminga part thereof.

My invention relates to improvements in elevators for passengers or freight; and the objects are to provide means for .securing the door of the'elevator and locking the elevator in a given position to prevent its operation while the doors leadinginto it are open or may I have fully and clearly illustrated my in:

vention in the accompanying drawings, wherein Figure l is a view of section of elevator, showing doors of the same and myinvention complete. Fig. 2 is a detail view showing section of floor of elevator and section of Wall beside the elevator and bolts used in securing the elevator when the doors are open.

Fig. 3 is an enlarged detail view showing another view of bolt and sliding bar used in its operation. Fig. 4 is an enlarged detail view of lever used to secure the door and to operate the bolts for locking the elevator. Fig. 5 is an enlarged view of latch used to secure the door to elevator-shaft, showing also a section of bolt for its operation.

Referring now to these illustrations, whereinlike parts are designated by similar letters of reference, A designates the wire frame of shaftin which the elevator-cage moves up and down.

B designates the upper partof the elevatorbar.

D is the door of the elevator-cage; E, the door to the elevator-shaft, constructed and adapted to open and close in the ordinary manner.

F is an inside dooror door to the cage of the elevator, constructed like the door to the shaft, adapted toslide on rollers ff at the top and bottom of the door, the upper rollers movmade in the lever, and at this point an arcshaped bar G is secured to the lever on the side contiguous to the elevator-door, said bar having a round hole in the center conforming to that in the lever, both holes forming a con tinuons opening.

J designates a flat bar of steel or othersuitablematerial extending across the bottom of the door of the cage'on the inside opposite the bar G and secured to the door in such manner as to be capable of a limited lateral movement. Two pairs of lugs KK are firmly secured to the upper and lower surfaces of the bar and extend outward through narrow slots J .1, cut in the door. The ends of the lugs are connected on the outside of, the door by means of the bars L L, firmly secured to the lugs. The logs are narrower than the slots and capable. of sliding in them, Fig. 3. A narrow vertical slot 3' is cut through the bar J and extends nearly the length of the one end extends bythe arcfshaped bar G, and as the slot approaches the end of the bar it diverges outwardly, so that the portion of the bar between the slot and the inner edge of the bar is thicker at this point.

M designates a bolt, one end of which is adapted to fit the opening in lever Gandbar G, the other end of the bolt having forked extensions N N, embracing the upper and lower surfaces of the bar J, Figs. 2 and 3. The bolt is supported in a horizontal po- The bar is attached to the door so that sition bythe post or brace M, secured to the floor, and is adapted to move back and forth through the eye of said post. I

. O designates a round boltor bar extending through the extremities of the forked extensionsN N, through the slotj, and downward through a slot (1 in the floor of. the cage. Underneath the floor it turns at a rightangle under and parallel. with the floor supported by the posts 0 0, secured to the floor, and is adapted to be pushed into a slot rain the wall A beside the cage, the vertical slot being provided to permit'the operator some latitude in stopping the elevator, it being inconvenient to stop ata precise point. When the bar J is in such position that the upper part of the bolt 0 enters the divergent part of the slotj, the bolts M and O are pushed outwardly away from the bar G and the wall A, and the elevator may be moved freely. When the bolt 0 enters the straight part of the slotj, the bolts M and O are pushed inwardly and are so situated and adjusted that the lower end of the bolt 0 enters the slot a and prevents the elevatorfrom moving, while the bolt M enters the opening I, if the elevator is at rest, and the hand-lever G in a vertical position.

Pivotally secured at one end to the upper surface of the bar J at a point near the center of the bar outside of the slotj is a lever P, having pivotal connection at the opposite end with a short lever R, made in the shape of an obtuse angle. The lever B is pivotally secured near the angle to the inside of the door F at the point r at the lower corner of said door and near the edge at which the door is secured. One fork of said lever extends away from the edge of the door, while the other extends downward. To the other end of said lever R is pivotally connected a long rod S, extending upward and pivotally connected at the upper end with the latch-lever T. The upper end of said rod S is bent in the form of an arc, the are extending toward the edge of the door. A lug m extends downward from the latch-lever, and to this lug the rod S is attached. The latch-lever T is pivotally secured to the plate f, which forms a solid part of the door of the cage. The latch-lever T has a round central part, with a side extension Z extending toward the edge of the door when the door is closed, and to the extension Z is secured a convenient handle v. A bolt 8 is secured to the center of the round part of the lever T, forming the axis of saidv lever, and extends through the end of the latch U, which operates on said bolt, and outward through the plate f of the door. The part of the bolt which extends outward from the door is square, with rounded corners, the square part forming a shoulder, which prevents the bolt from slipping back. A lug m, having rounded corners, is'cast on said bolt near the outer end of the square part and extends in an opposite direction from the extension Z. On the round part of the lever T, nearly opposite the extension Z, is a short extension at, having a square-cornered lug at, extending in the same direction as the bolt 5. When the latch-lever is raised and turned over, as will be presently described, the lug 02 comes under the central part of the latch u andlifts it out of the catch ac. Aplate e is secured to the inside of the door to the elevator-shaft opposite the plate of the inside door. A latch V, shaped like the two sides of a triangle, is pivotally secured at the point to to said plate and is adapted to secure the door by connection with the catch 40. Above the pivot of the latch a slot W is cut in the latch, and a spring V, secured to the plate 6, operates in the slot, pressing the upperpart of the latch downward upon the catch. Secured to the plate of the door E and extending vertically parallel to the lower part of the latch V is a bar V. There is sufficient space between the latch V audthe bar V for the square part of the bolt 5 to pass. WVhen it is not desired to stop the elevator on a certain floor, the door of the cage being closed, the bolt 8 passes between the latch V and the bar V without disturbing the latch; but when the elevator is stopped and it is desired to open both doors the lever-latch T is lifted, which turns over the bolt 8 and brings the lug "u, in contact with the lower .part of the latch V, thus lifting the latch clear ofthe catch. Springs X X, secured to the plate e, operate in the slots V of the bar V and regulate the distance between the latch and bar and the pressure against the bolt 8. The inside corners of the bar V are rounded, which permits the bolt 8 to pass without undue friction. The rounded corners of the square part of the bolt permit it to turn freely between the latch and the bar V.

My invention is intended to be used and operated as follows: As indicated in Fig. 1 of the drawings, the doors of the cage and of the shaft are closed, and the cage can pass freely in either direction. The dotted lines indicate the positions of the different parts of my invention when the doors are unlatched and the elevator is locked in its position. .When the elevator stops to receive or-diseharge passengers or freight at a certain floor, the latch-lever T is turned over, as indicated in Fig. 1, the lug 97. comes in contactwith the latch U, lifting it out of the catch, and the lug u is turned against the lower part of the latch V on the outside door, thus lifting the latch. As the door of the cage is pushed back the bolt .9, pressing against the bar- V, pushes the door of the shaft back at the same time. The lifting and turning of the latchlever raises the rod S,which, operating in turn on the levers R and P, pushes back the sliding bar J, so that the upper part of the bolt 0 enters the straight part of the bar j, thus pushing the bolt M into the opening I and the lower end of the bolt 0 into the slot a. Theelevator cannot then be moved until both doors are closed and latched. The sliding of the doors does not affect the locking of the elevator in its position, as it is locked by the lifting of the latch before the doors are opened and is not u nlocked until the latches are again secured.

It will be seen that with my invention itis impossibleto move the elevator while either of the doors isopen or unsecured, and one of the most fruitful sources of accidents isthus removed.

Having described my invention,"what I claim as new, and desire to secure by Letters cage of the elevator, a bolt secured to said first bolt supported by suitablemeans and adapted to have one end engage the hand-. lever of the elevator and secure said lever whenlsaid bar is moved, and a lever for moving said bar, substantially as described.

2. A door to an elevator-cage, a bar extending across the inside of said door and capable of aliinited lateral movement, said bar having a vertical slot cut longitudinally therethrough and diverging at one end, a bolt having forked extensions which embrace the upper and lower surfaces of said her and movably secured opposite the hand-lever ofthe elevator and the other end of said bolt adapted to engage said lever, said forked extensions embracing said bar near the end where said slot diverges, a bolt secured to the ends of said forked extensions passing through said'slot and bent in such manner that the end thereof is capable of entering a slot in the wall beside the elevator, and a lever for moving said bar upon the door, substantially as described.

3. A doorto an elevator-cage having alatch securing the same, a latch-lever pivotally se- I cured to said door having a lug capable of raising said latch when said lever is turned, a bolt secured atone end to said latch-lever and extending through and beyond said door, a lug near the outer end of said bolt, in corn,-

door is closed, a bar secured to said door parallel with the vertical part of said latch, and at a suificient distance from said latch to per-' mit the said bolt to pass between, substan-v tially as described.

at. A movable bar extending across the in- 1 side of a door to an elevator-cage, said bar hav- 1 ring a vertical slot cut longitudinally there-j through and diverging outwardly at the end near the hand-lever of the elevator, a bolt opcrating in the slot of said bar, oneend of which i is adapted to engage and lock the hand-lever of the elevator when said leveris in a vertical position, a second bolt connected with said first bolt and adapted to enter the wall at the same time and secure the elevator in its po-' sition, a lever pivotally secured at one endto said movable bar and at the otherend pivotall y'connectedwith the latch for securing the door, sai'd lever being adapted when the latch is raised to pull said movable bar into such position that the said first bolt is in the straight part of said slot and is thereby thrown into connection with said hand-leversecuring the same, substantially asdescribed;

z -5. A door to an'elevator-cage, a bar movably secured to said door and having a vertical slot cut longitudinally throughsa'id bar,

said slot diverging 'outwardly at the end opposite the hand-lever of the elevator, a bolt having forked extensions embracing the up per and lower surfaces of said bar and movably secured opposite said hand-lever, the other end of said bolt being adapted to engage said lever, a bolt secured to the ends of said forked extensions passing through said slot and adapted to have one end engage a slot inthe wall beside the elevator a lever pivotally connected at one end to said bar and having pivotal connection at the other end with the latch-lever ofsaid door, a latchlever pivot-all y secured to said door and adapted to raise the latch of said door and to move said bar having said slot, abolt secured to said latch-lever and extending through and beyond said door, said bolt having a lug near the outer end; thereof extending ata right angle to said bolt, in combination with the door to the elevator-shaft, a triangulanshaped latch pivotally attached to said door and adapted to secure the same, a bar secured to said door parallel with thefree part'of said latch and at a suflicient distance from said latch to permit said bolt to pass between, substantially as described.

6. A door to an elevator-cage adaptedto slide on suitable rollers, a bar J extending across the lower part of said'door and adapted to be moved laterally on said door, said bar havinga vertical slot cutlongitudinally there- ,through and diverging toward said door at the rear end thereof, an arc-shaped bar G secured to the hand-lever of said elevator a short distance above the elevator-floor, said bar having an opening in the part secured to said lever, a bolt M having forked extensions N, N, movably supported opposite said bar by suitable means and adapted to engage the opening in said bar G, the forked extensions 1 end of said lever being pivot-ally secured to l a lever S, said lever S being pivotally sc cured to a latch-lever T, a latch-lever T pivotally secured to said door, having a round central part and an extension 1 with handle '1), and an extension n with lug n adapted to lift the latch when the lever is turned, a bolt 3 secured to the round central part of said latch-lever and extending through and beyond said door, said bolt 3 having a lug it near the outer end of said bolt extending at a right angle to said bolt and in the opposite direction from said extension Z, in combination with a door to the elevator-shaft, a triangular-shaped latch V adapted to secure said door by connection with the catch cc, said latch being pivotally secured to said door, a

FREDERICK HEIZER.

Witnesses:

F. W. Lorin, H. O. GARDINER. 

